From 94acff9f2616fbca8fd31292d374d9ce8a45263a Mon Sep 17 00:00:00 2001
From: Filias Heidt <fh@netzkommune.de>
Date: Fri, 9 Jun 2017 14:46:00 +0200
Subject: [PATCH] add support for opensmtpd

--- plugins-scripts/check_mailq.pl.orig	2020-12-09 21:38:01 UTC
+++ plugins-scripts/check_mailq.pl
@@ -550,6 +550,39 @@ elsif ( $mailq eq "nullmailer" ) {
 	}
 } # end of ($mailq eq "nullmailer")
 
+elsif ( $mailq eq "opensmtp" ) {
+	## open mailq
+	if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
+		if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
+			print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
+			exit $ERRORS{'UNKNOWN'};
+		}
+	}elsif( defined $utils::PATH_TO_MAILQ){
+		unless (-x $utils::PATH_TO_MAILQ) {
+			print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
+			exit $ERRORS{'UNKNOWN'};
+		}
+	} else {
+		print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	$msg_q++ while (<MAILQ>);
+
+	close(MAILQ) ;
+	if ($msg_q < $opt_w) {
+		$msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+		$state = $ERRORS{'OK'};
+	}elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+		$msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+		$state = $ERRORS{'WARNING'};
+	}else {
+		$msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+		$state = $ERRORS{'CRITICAL'};
+	}
+} # end of ($mailq eq "opensmtp")
+
+
 # Perfdata support
 print "$msg|unsent=$msg_q;$opt_w;$opt_c;0\n";
 exit $state;
@@ -612,7 +645,7 @@ sub process_arguments(){
 	}
 
 	if (defined $opt_M) {
-		if ($opt_M =~ /^(sendmail|qmail|postfix|exim|nullmailer)$/) {
+		if ($opt_M =~ /^(sendmail|qmail|postfix|exim|nullmailer|opensmtp)$/) {
 			$mailq = $opt_M ;
 		}elsif( $opt_M eq ''){
 			$mailq = 'sendmail';